Arguments against Bitcoin using adaptive blocksizes

Besides the risk of miners artificially increasing the average block size on purpose, what are some of the potential negatives of adaptive blocksizes?

Aside from:

  • Difficulty in designing an adaptive blocksize formula that cannot be “gamed”
  • Difficulty in creating the best model to minimize cost of node-option (CONOP)
  • Difficulty in designing a system that can efficiently scale both up and down
  • Time and expense to compare alternative formulas and thoroughly testing them

Are there any advantages of human set hard limits? Are there any advantages of requiring periodic human intervention to evaluate and modify blocksize limits instead of codifying that task?

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Bitcoin Price Undecided Below $650

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Are mneominic seeds forward compatible to all future versions of Bitcoin Core?

If I have not downloaded Bitcoin Core and the current source code (version 12.1) somehow is no longer available (unlikely I know) will I be able to use a mnemonic seed I create now with all future version of Bitcoin Core?

Are there any advantages of my retaining a copy of Bitcoin Core version 12.1 if my only purpose on doing so is wallet recovery several years from now?

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What are some examples of companies that have abandoned Bitcoin payment processors in favor of in house Bitcoin integration?

What are some examples of companies that have abandoned Bitcoin payment processors in favor of in house Bitcoin integration?

For example which companies previously relied on Coinbase or Bitpay that now accept Bitcoin directly without the assistance of any 3rd party payment processors?

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